JPH0735852Y2 - Reef block for fish nest - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a revetment block for fish nests capable of maintaining the habitat of fish and other aquatic animals.

[Prior art]

Conventionally, as a structure for protecting aquatic animals, especially fishes in rivers and waterways, a waterway block is known in which the bottom surface of the waterway has irregularities such as ridges at regular intervals. It was only to the extent that it had the function of maintaining the depth at which fish could live even in the next drought. Attempts have also been made to form a habitat for fish by making holes in the side walls of concrete channels. However, it was not possible to provide a suitable habitat because sufficient water did not remain in the hole when it was drought, or because it could not have various fish nest structures. In particular, the main purpose of providing a ridge on the bottom surface of the waterway block is to reduce the excessive flow velocity, and it has not been possible to provide a sufficient habitat for fish. In other words, even when the water is drought, it keeps the depth of water where fish can live and causes the generation of aquatic plants to some extent, but it is swept away from external enemies, etc. and due to excessive flow velocity due to increased water and gradients. There is no place to avoid
Nor could it be a suitable breeding ground. Therefore, for the purpose of providing a sufficient habitat for fish and the like, the bottom surface of the waterway block is provided between the ridges of the waterway block in which a plurality of ridges are provided on the bottom surface of the waterway at substantially right angles to the water flow direction. We have previously proposed a fish nest block with a shape that can be covered by the corner formed by the side wall and has a notch on the side edge or a through hole on the side (actual fair 3-
No. 5245).

[Problems to be solved by the device]

Generally, such a conventional structure uses a projection of a waterway composed of a concrete member or covers a part of a corner of the bottom of the waterway. It was necessary to make it more suitable for the habitat environment of fishes, unlike the holes in the sea and the complex and deep cavities formed on the revetment of stone walls. Attempts to provide a habitat suitable for fish while exhibiting the function of a revetment by rivers and revetment blocks themselves can be seen, for example, in No. Shokai 53-29995. It hasn't arrived.

[Means for Solving the Problems]

Therefore, as a result of various studies on the above-mentioned problems, a structure having a front wall opening (5) in the front wall (1), a frame body communicating with the upper and lower sides, and stones filled in the vertically stacked interior The fish nest protection block for fish nests having a structure in which an opening (7) communicating with the backing material (8) which becomes a fish nest is provided in the rear wall (2). The fish nest revetment block having such a structure is provided with a bolt insertion hole (16) in the side wall (3) for joining the blocks, and a plug joint structure for connecting the blocks vertically or horizontally. Alternatively, the lowermost foundation block may be provided with a base plate (15) that extends forward and backward in order to ensure stability.

[Action]

INDUSTRIAL APPLICABILITY The fish nest revetment block of the present invention can be vertically and horizontally connected by the action of the connecting portion to form a revetment, and the revetment can be filled with hollow stones in the cavity communicating vertically, and The opening (5) of the wall (1) allows fish to enter and leave, and is suitable for a fish nest. Further, the openings of the left and right side walls communicate with each other to widen the nest of the fish nest. When this block is provided with a protrusion (6) in the vicinity of the front wall opening (5), a swirl is formed by the protrusion (6) to purify the water inside the block and the action of fish coming near can get. Since the seawall block for fish nests of the present invention also has the opening (7) in the rear wall (2), the backing material portion is made into a suitable fish nest by communicating with the backing material (8). You can

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a right side view. FIG. 5 is a sectional view taken along line AA in FIG. This fish nest revetment block is shown in Fig. 11 for its usage, but it is suitable not only for the lowermost foundation but also for the second stage or more. This reef block for fish nests is composed of a frame body of a horizontally long rectangular parallelepiped having a hollow inside, and a front wall (1) is provided with stepped openings (5), on both sides of which the above-mentioned action is performed. There is a vertical protrusion (6) (6) with. The rear wall (2) is also provided with an opening (7). This opening (7) is composed of two round holes and communicates with the backing material (8) which becomes a fish nest, as shown in FIG. Openings (9) are also provided in the left and right side walls (3) (3), which allow lateral communication of the filling stone (10). The vertical direction of such a frame body is open,
Similarly, the Nakasume stone (10) communicates vertically. The product of the present invention is a type of revetment block, and has a structure that exerts a revetment function by connecting in succession in the vertical (upper and lower) and horizontal (left and right) directions. For this purpose, a concavo-convex (insertion) joint (11) (12) structure is formed as a connecting portion in the left-right direction, and a bolt insertion hole (16) is provided to strengthen the lateral connection. In addition, uneven parts (13) (14) to maintain a multi-stage stable connection even in the vertical direction.
Is formed. Figures 6 to 10 show a fish nest seawall block used as the bottom foundation of a multi-tiered seawall constructed with the fish nest seawall block of the present invention. FIG. 6 is a perspective view, FIG. 7 is a plan view, FIG. 8 is a front view, and FIG. 9 is a right side view. FIG. 10 is a cross-sectional view taken along the line BB in FIG. 7. This block has a base plate (15) that extends forward and backward at the bottom. Since most of the area is likely to be buried in the riverbed soil, the front wall (1) has an opening (5) cut out from the top,
There are no vertical protrusions (6), (6) on both sides thereof that generate the vortex in the above-mentioned embodiment. As shown in Fig. 11, the adjusted mortar (1
7) Install the fish nest revetment block (20b) for the foundation on top of this, and stack the fish nest revetment block (20a) of the present invention on it in multiple stages so that the required height is achieved. The filling stones (10) are packed in the communication cavities on the top, bottom, left and right as described above. A top plate (18) is placed at the top, and earth and sand are placed on it. On the back part of the block rear wall (2), crushed stone which is slightly smaller than the filling stone (10) is used as the backing material (8). This filling material (8) also communicates with the opening (7).
It becomes a fish nest with the part of. The backfill material (8) is isolated from the backfill crushed stone (21) and earth and sand by using a suction prevention filter (19). This anti-suction filter (19) may be omitted depending on the soil quality behind it.

[Effect of device]

Since the sea nest block for a fish nest of the present invention has the above-mentioned structure, it can function as a fish nest while allowing the fish to easily enter and leave, and the filling stone from the opening. It is exposed, communicates between blocks, and communicates with the backing material, making it a good fish nest. Even when viewed from the construction side as a revetment block, it is easy to connect vertically and horizontally.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a right side view. FIG. 5 is a sectional view taken along line AA in FIG. 6 to 10 show a basic block used in the construction of the present invention, FIG. 6 is a perspective view, FIG. 7 is a plan view,
FIG. 8 is a front view and FIG. 9 is a right side view. FIG. 10 is a sectional view taken along line BB in FIG. FIG. 11 is a cross-sectional view of a revetment construction state using the fish nest revetment block of the present invention. (1) ... front wall, (2) ... rear wall (3) ... left and right side walls, (5) ... front wall opening (6) ... projection, (7) (9) ... opening (8) ... backing Material, (10)… Medium filling stone (11) (12)… Concave and convex joint, (13) (14)… Concave and convex part (15)… Base plate, (16)… Bolt insertion hole (17)… Adjustment mortar, (18)… Top plate (19)… Filter, (20)… Revet block for fish nest

Claims (1)

[Scope of utility model registration request] 1. A revetment block for a fish nest, comprising a frame main body having a front wall opening (5) and a front wall opening (5) communicating with the front wall (1), for packing stones inside the stack. A revetment block for fish nests, wherein (2) is provided with an opening (7) communicating with a backing material (8) which becomes a fish nest.